Guang Gao,Anthony S. Clare,Eleni Chatzidimitriou,Craig Rose,Gary Caldwell
Ulva is increasingly viewed as a food source in the world. Here, Ulva rigida was cultured at two levels of temperature (14, 18 °C), pH (7.95, 7.55, corresponding to low and high p CO 2 ), and nitrate conditions (6 μmol L −1 , 150 μmol L −1 ), to investigate the effects of ocean warming, acidification, and eutrophication on food quality of Ulva species. High temperature increased the content of each amino acid. High nitrate increased the content of all amino acids except aspartic acid and cysteine. High temperature, p CO 2 , and nitrate also increased the content of most fatty acids. The combination of high temperature, p CO 2 , and nitrate increased the swelling capacity, water holding capacity, and oil holding capacity by 15.60%, 7.88%, and 16.32% respectively, compared to the control. It seems that the future ocean environment would enhance the production of amino acid and fatty acid as well as the functional properties of Ulva species.
Guang Gao,Anthony S. Clare,Craig Rose,Gary S. Caldwell
Periodic biomass losses caused by reproduction have greatly limited the expansion of the land-based cultivation of the seaweed Ulva . In an attempt to resolve this, we obtained a sterile mutant (SM) of U. rigida by mutating a wild type (WT) strain using ultraviolet radiation (UVC). The SM grew five times faster than the WT with 40.0% and 30.9% higher nitrate and phosphate uptake rates. Crucially, the SM remained in the vegetative state throughout the 27-day trial, unlike the WT. The lipid content was more than double that of the WT with more monounsaturated, polyunsaturated, omega-3 and omega-6 fatty acids but with a 26.3% lower protein content. The swelling, water holding, and oil holding capacities were all lower than the WT. The rapidly growing SM showed distinct promise for application to carbon capture and wastewater bioremediation and for more conventional aquaculture practices. Despite some modified nutritional and functional properties, the SM still retained a desirable nutritional profile.
危险品化学品经营许可证（带存储）